Saitama wasn't really a curious person, when there was something that he didn't understood, he wouldn't try to understand it, he would either ignore it or punch it. This new Saitama however was curious, and that's why he was currently analyzing the weird red crystal that he had stolen from the monkeys-like monsters.

He had tried many things to understand what was this crystal. It wasn't a weapon, that much he knew since it couldn't anything bad, be it to him or normal humans. Since the monsters considered it important and seemed to even worship it, he thought that maybe it was some sort or sealing crystal. Like there was some incredible monster hiding inside it, but he knew it was just the part of him that wanted a good fight that thought like that. In the end, he just couldn't understand what it was, but he wasn't gonna give up just like that.

"Hmm.....It seems to glow sometimes, but i still cannot get why it would glow. It doesn't produce any sound, and it's quite heavy. It can withstand a quarter of my strengh before it's about to be crushed. Hmmm........What could it be ?" Asked Saitama, throwing the crystal in the air, catching it and throwing it again. He was about to catch it again, but a certain sound got his attention. He turned his head and saw that there was a mosquito on his right hand, he smirked and with a speed that only someone like him could have, slapped his hand. To his surprise the mosquito flew from his hand, as if he wasn't just slapped.

Saitama smirked even wider, knowing exactly what this mosquito was.

"So canon started, huh ? It's quite weird, normally i was supposed to beat that giant dude before the fight with the mosquito girl came. I wonder what happened to that dude. Now that i think about it, there was also this monster that looked like Piccolo." Said Saitama. He watched as the mosquito flew towards his face. This new Saitama wasn't stupid enough to just act try to slap the mosquito without even thinking, instead he got into position and started to do side-steps at the speed of sound. As he did his side-steps he also used his hands to slap in front of him. Because of how many Saitama there was, the mosquito couldn't even fly a few seconds before he was slapped , and on Saitama's couch.

"AHAH!! This side-step technique is just so good! Though i wonder how this mosquito even survived the first slap. Meh!"Exclaimed Saitama. If he wasn't so busy celebrating his victory, he would've noticed that the crystal glowed, and as if he wasn't even dead in the first place, the mosquito started to fly in the air again.

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(Somewhere in Z-City)

The city that was once bursting with life looked like it went through a rather destructive battle. Most buildings were either burned or destroyed, the streets had became black, and ashes covered the roads. In the middle of the road, just in front of a building that looked it was sliced by gigantic and powerful blades, a blond man stood. Actually it wasn't correct to call him a man. The man was actually a cyborg, which was quite easy to understand since one of his arm had been severed, showing the cables that made his entire body.

The young man glared at something that flew in the air with impressive speed. It was a red half-mosquito, half-human woman. For some reasons, she had no legs, but she did have a horn on which was the arm of the cyborg.

"Did you see that ? Do you truly think you can even beat me ? I just took your arm without you being able to even......." The woman stopped her taunt when she noticed that she had lost both her legs."Wait, where are my legs ?" Asked the woman, though she quickly understood what happened when she saw the smug look on the cyborg's face.

"GRRR, you're not gonna keep that smug look of yours for long!!!" Yelled the woman, before she rushed at the man, who was quite taken aback by her speed. He didn't even have the time to react, that he was already sent flying in the air. In just a few seconds, the mosquito woman had slashed him so much that his body was nearly cut in two. The cyborg knew he had no chance to beat her, but he had a trump card.

'It seems that it's how it ends. I'm sorry doctor......'Thought the Cyborg as the mosquito woman approached him laughing madly. His core began to shine brightly as he was about to self-destruct. However he quickly stopped the process when the mad laugh of his ennemy was replaced with the sound of an explosion that sent him flying in a nearby building with said woman.

" Now i understand why he hated those damn mosquitoes, i don't even know how they can dodge my strikes so easily." Said a man who suddenly appeared in front of Genos. The cyborg didn't know how the man did it, but he was sure that he was the one who had caused this explosion. Actually he could see that a few buildings had been destroyed.

"Wow, you both look like you need some help." Said the man, looking at the mosquito woman and Genos. The cyborg turned his head with some difficulty and was pleasantly surprised when he saw that his ennemy was impaled on a metal pipe.

"*Cough* W-Who are you ?" Asked Genos, but the man ignored him and helped the mosquito woman. Said woman tried to move and attack the man, but found that he was blocking both her arms, and no matter how much she tried she couldn't get out of his grip.

"Now, now girl. Before you even try to move, tell him who you are and why you were about to kill this cyborg. " Asked the man, with a hint of humor.

"I won't tell you a-anything!" Said the stubborn woman, as she tried to move once again. But this time, the man tackled her on the ground.

"Well, first you should tell me your name. "Said the man.

"I'm M-Mosquito Girl!" Said the woman.

"..........Mosquito Girl. *Chuckle* What a stupid name. Even monsters from Power Rangers have better names." Said the man mockingly. The woman was about to yell at him, but a quick chop to her neck silenced her, shocking Genos with how fast and powerful he was. The man turned towards Genos and smiled, before appearing in front of him. Well Genos knew he was smiling, though he couldn't actually see it since the man was wearing a black face-mask that covered half of his face. He was wearing a simple black hooded sweatshirt, with a black short that reached to his knees. For some reasons, Genos couldn't see the upper half of the man's face, but he saw something red shining through the man's pocket.

"Well, Mr.Cyborg, i'm gonna get this woman to the Hero Association, you should go see a doctor or something."Said the man, turning around and walking in the direction of A-City.

"Wait!" Shouted Genos, this got the man's attention but he didn't face Genos.

"I want to become your disciple, i need to become stronger so that i can-"

"Okay" Said the man.

"...What ?" Asked Genos, not sure how he was supposed to react. He didn't think the man would agree so easily.

"I said okay, you can be my disciple. Though it's gonna take you a lot of effort to become stronger." Said the man.

".......Since you are to be my Sensei, i want to know your name." Said Genos, eager to know the name of the man who would help him become stronger.

"My name..........I'm the Rank 1 S-Class Hero of the Hero Association, Blast!"